Auxiliary clamping and aligning device for machining nuclear power rotor intermediate shaft through boring machine and using method of auxiliary clamping and aligning device

Abstract

The invention relates to an auxiliary clamping and aligning device for processing a nuclear power rotor intermediate shaft by a boring machine and a use method, and aims to solve the problem that the conventional rotor intermediate shaft performs wheel hole processing on two V-shaped brackets just like a rotor and performs processing in a non-clamping state by virtue of frictional resistance generated by the self weight of the rotor intermediate shaft. According to the scheme, the auxiliary alignment ring, the flange supporting and clamping seats and the rear flange abutting stop seat are sequentially arranged from front to back, the auxiliary alignment ring is detachably fixed to the flange supporting and clamping seat in the front, the rear flange abutting stop seat is used for abutting against a rear flange of the intermediate shaft, and the flange supporting and clamping seat in the rear is used for clamping the rear flange of the intermediate shaft. The front flange supporting and clamping seat is used for clamping the front flange of the intermediate shaft, the auxiliary alignment ring is used for being connected with a dial indicator used for measuring levelness of multiple positions of the front end face of the front flange of the intermediate shaft, the auxiliary alignment device can assist a machine tool in leveling the end face of the intermediate shaft when the machine tool machines other workpieces, the alignment time of the workpieces is saved, and the machining efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of intermediate shaft auxiliary clamping and alignment, specifically to an auxiliary clamping and alignment device and its usage method for machining intermediate shafts of nuclear power rotors on a boring machine. Background Technology

[0002] Previously, the machining of the intermediate shaft of the rotor was usually carried out on a large gantry milling machine with the upper end face facing upwards. However, due to the high cost of gantry milling, the cost of boring machines is much lower than that of gantry milling. Moreover, gantry milling is a heavy-duty process that takes up a lot of machine time and restricts the production progress of other large parts. Since the intermediate shaft of the rotor is much lighter than the rotor, it cannot be machined in a non-clamped state by relying on the frictional resistance generated by its own weight on two V-shaped supports like the rotor. Therefore, the difficulty of machining the intermediate shaft on a boring machine lies in the difficulty of clamping, the lack of suitable clamping fulcrums, the risk of axial movement during machining, and the lack of suitable fixtures. Summary of the Invention

[0003] The purpose of this invention is to address the problem that, in the past, the machining of the intermediate shaft of a rotor was typically carried out on a large gantry milling machine with the upper end face facing upwards. However, gantry milling is expensive, while boring machines are far cheaper. Moreover, gantry milling is a heavy-duty process that takes up a lot of machine time, thus hindering the production progress of other large parts. Since the intermediate shaft of a rotor is much lighter than the rotor, it cannot be machined without clamping by relying on the frictional resistance generated by its own weight on two V-shaped supports like the rotor. This invention proposes an auxiliary clamping and alignment device and its usage method for machining the intermediate shaft of a nuclear power rotor on a boring machine.

[0004] The objective of this invention is achieved as follows: an auxiliary clamping and alignment device for machining the intermediate shaft of a nuclear power rotor on a boring machine, comprising a rear flange tightening stop seat, an auxiliary alignment ring, and two flange support clamping seats;

[0005] The auxiliary alignment ring, flange support clamping seat, and rear flange tightening stop seat are arranged sequentially from front to back. The auxiliary alignment ring is detachably fixed to the front flange support clamping seat. Both flange support clamping seats and the rear flange tightening stop seat are fixed to the worktable of the boring machine. The rear flange tightening stop seat is used to hold the rear flange of the intermediate shaft. The rear flange support clamping seat is used to clamp the rear flange of the intermediate shaft. The front flange support clamping seat is used to clamp the front flange of the intermediate shaft. The auxiliary alignment ring is used to connect a dial indicator to measure the levelness of multiple positions on the front end face of the front flange of the intermediate shaft.

[0006] Furthermore, the rear flange tightening stop seat includes a tightening bracket, four square-headed screws, and four tightening nuts;

[0007] The front end face of the clamping bracket has an inverted T-shaped groove arranged in a cross shape. The heads of the four square-headed screws are all set in the inverted T-shaped grooves and slidably connected to them. The four square-headed screws are arranged in a cross shape, and a clamping nut is threaded to the end of the threaded section of each square-headed screw.

[0008] Furthermore, the top support is made of a right-angled bent plate with two triangular reinforcing ribs welded on.

[0009] Furthermore, the flange support clamping seat includes a flange base, a movable V-shaped bracket, a Z-shaped clamping block, a lifting nut, two screws, and two nuts;

[0010] The flange base has columns with grooves on both sides of the top. Each end of the movable V-shaped bracket is slidably connected to the groove of one of the columns. A threaded column is set in the middle of the top of the flange base. The lifting nut is threadedly connected to the threaded column and fits against the bottom of the movable V-shaped bracket to support it. The screw is fixed to the top of the column. Each end of the Z-shaped clamping block is slidably connected to a screw. Each nut is threadedly connected to a screw and presses against the Z-shaped clamping block.

[0011] Furthermore, the auxiliary alignment ring includes an alignment ring body and a slider;

[0012] The alignment ring is fixed to the front of the flange support clamping seat by positioning bolts. The slider is provided with an arc-shaped tenon groove. The arc-shaped tenon groove of the slider is slidably connected to the alignment ring. The slider moves in a circle along the central axis of the alignment ring. The slider is used to connect a dial indicator to measure the levelness of the front flange face of the intermediate shaft.

[0013] Furthermore, the alignment ring body includes a circular ring plate, a raised tenon-shaped positioning ring, and two connecting arms;

[0014] Two connecting arms are symmetrically arranged at the lower part of the ring plate. The raised tenon-shaped positioning ring is coaxially arranged at the front part of the ring plate. The ring plate, the raised tenon-shaped positioning ring and the two connecting arms are integrally formed. The slider is slidably connected to the raised tenon-shaped positioning ring.

[0015] Furthermore, the raised tenon-shaped positioning ring is provided with a keyway, and the keyway has a screw hole, which is fixed by a locking screw to form an open key block.

[0016] Furthermore, oblong holes are provided around the two flange support clamping seats and the rear flange tightening stop seat. Bolts pass through the oblong holes of the two flange support clamping seats and the rear flange tightening stop seat to position them on the worktable of the boring machine.

[0017] Furthermore, the method for using the auxiliary clamping and alignment device for machining the intermediate shaft of a nuclear power plant rotor on a boring machine includes the following steps:

[0018] It includes the following steps:

[0019] Step 1: Place the two flange bases on the worktable of the boring machine. Fix the auxiliary alignment ring to the front flange base with positioning bolts. Insert the slider from the keyway and mate the arc-shaped tenon groove of the slider with the raised tenon-shaped positioning ring with zero clearance. Then, place the open key block into the keyway machined on the raised tenon-shaped positioning ring and fix the open key block to the raised tenon-shaped positioning ring with locking screws.

[0020] Step 2: Align the raised tenon-shaped positioning ring with the machine tool machining plane on the front flange base; fix the front flange base on the worktable of the boring machine;

[0021] Step 3: Measure the distance between the front flange and the rear flange of the intermediate shaft, and place the rear flange base on the worktable of the boring machine according to this distance and fix it to the worktable of the boring machine;

[0022] Step 4: Screw the lifting nut onto the threaded post of each flange base, insert both ends of the movable V-bracket into the sliding grooves of the columns at both ends of the flange base, and adjust the height of the front and rear V-brackets according to the theoretical dimensions of the front and rear flanges of the intermediate shaft to ensure that the axis is horizontal when the intermediate shaft is placed.

[0023] Step 5: Lift the intermediate shaft horizontally, so that the outer circles of the front flange and the rear flange of the intermediate shaft rest on the corresponding movable V-shaped brackets. Add copper gaskets between the outer circles of the front flange and the rear flange of the intermediate shaft and the corresponding movable V-shaped brackets.

[0024] Step 6: Place the rear flange tightening stop seat on the rear flange side of the intermediate shaft, fix the rear flange tightening stop seat on the worktable of the boring machine, screw the four tightening nuts into the four square head screws, and then install the four square head screws into the cross-shaped inverted T-slots of the rear flange tightening stop seat respectively. Select four symmetrical points and rotate the tightening nuts to tighten the rear flange of the intermediate shaft.

[0025] Step 7: Attach the dial indicator base to the slider, adjust the dial indicator rod and dial indicator head, and place the dial indicator head on the front flange of the intermediate shaft. Slide the slider in a circular motion and measure the flatness of the front flange of the intermediate shaft with the dial indicator. Adjust the height of the two movable V-bolts and the elongation of the tightening nuts on the four square head screws, and adjust the thickness of the copper shims between the intermediate shaft and the two movable V-bolts to ensure that the front flange of the intermediate shaft meets the flatness requirements for machining.

[0026] Step 8: Finally, place the two Z-shaped clamping blocks on the upper part of the outer circle of the front flange and the outer circle of the rear flange of the intermediate shaft. Tighten the Z-shaped clamping blocks with four nuts to press the front and rear flanges of the intermediate shaft. The top nuts on the four square head screws press the rear flange of the intermediate shaft to complete the clamping and alignment of the intermediate shaft.

[0027] Furthermore, in step two, the protruding tenon-shaped positioning ring is leveled on the front flange base with a tolerance of ≤ ±0.005mm.

[0028] Beneficial effects:

[0029] By using an auxiliary clamping and alignment device for machining the intermediate shaft of a nuclear power plant rotor on a boring machine, the problem of clamping and machining the intermediate shaft on a boring machine was solved, meeting the machining technical requirements, resolving the bottleneck problem in the production progress of gantry milling, and reducing machining costs. By setting up the auxiliary alignment device, the machine tool can be assisted in leveling the end face of the intermediate shaft while machining other workpieces, saving workpiece alignment time and improving machining efficiency. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the intermediate shaft to be processed;

[0031] Figure 2 This is a schematic diagram of the flange base of the present invention;

[0032] Figure 3 This is a schematic diagram of the rear flange tightening stop seat of the present invention;

[0033] Figure 4 This is a schematic diagram of the auxiliary alignment loop of the present invention;

[0034] Figure 5 This is a side view of the alignment device of the present invention;

[0035] Figure 6 This is a top view of the alignment device of the present invention;

[0036] Figure 7 This is a perspective view of the alignment device of the present invention. Detailed Implementation

[0037] Specific implementation method 1: Auxiliary clamping and alignment device for machining the intermediate shaft of a nuclear power rotor on a boring machine, which includes a rear flange tightening stop seat 3, an auxiliary alignment ring 4, and two flange support clamping seats 2;

[0038] The auxiliary alignment ring 4, flange support clamping seat 2, and rear flange tightening stop seat 3 are arranged sequentially from front to back. The auxiliary alignment ring 4 is detachably fixed on the front flange support clamping seat 2. Both flange support clamping seats 2 and the rear flange tightening stop seat 3 are fixed on the worktable of the boring machine. The rear flange tightening stop seat 3 is used to hold the rear flange of the intermediate shaft 1. The rear flange support clamping seat 2 is used to clamp the rear flange of the intermediate shaft 1. The front flange support clamping seat 2 is used to clamp the front flange of the intermediate shaft 1. The auxiliary alignment ring 4 is used to connect a dial indicator to measure the levelness of multiple positions on the front end face of the front flange of the intermediate shaft 1.

[0039] In this embodiment: the auxiliary alignment ring, the flange support clamping seat, and the rear flange tightening stop seat are arranged sequentially from front to back. The auxiliary alignment ring is detachably fixed on the front flange support clamping seat. The rear flange tightening stop seat is used to hold the rear flange of the intermediate shaft. The rear flange support clamping seat is used to clamp the rear flange of the intermediate shaft. The front flange support clamping seat is used to clamp the front flange of the intermediate shaft. The auxiliary alignment ring is used to connect a dial indicator to measure the levelness of multiple positions on the front end face of the front flange of the intermediate shaft.

[0040] Specific implementation method 2: Auxiliary clamping and alignment device for machining the intermediate shaft of nuclear power rotor on a boring machine, the rear flange tightening stop seat 3 includes a tightening bracket 3-1, four square head screws 3-2 and four tightening nuts 3-3;

[0041] The front end face of the clamping bracket 3-1 has an inverted T-shaped groove arranged in a cross shape. The heads of the four square-head screws 3-2 are all set in the inverted T-shaped groove and slidably connected to it. The four square-head screws 3-2 are arranged in a cross shape. The end of the threaded section of each square-head screw 3-2 is threadedly connected to a clamping nut 3-3.

[0042] In this embodiment: Rotating the tightening nut can adjust its position on the square-headed screw, further tightening the rear flange of the intermediate shaft.

[0043] Other implementation methods are the same as those in Specific Implementation Method 1.

[0044] Specific implementation method 3: The auxiliary clamping and alignment device for machining the intermediate shaft of the nuclear power rotor on a boring machine, the top support 3-1 is made of a right-angle bent plate with two triangular reinforcing ribs welded on.

[0045] In this embodiment, the clamping bracket is made of a right-angled bent plate with two triangular reinforcing ribs welded on, which is simple to manufacture and has a stable connection.

[0046] Other implementation methods are the same as those in Specific Implementation Method Two.

[0047] Specific implementation method four: Auxiliary clamping and alignment device for machining intermediate shaft of nuclear power rotor on boring machine, flange support clamping seat 2 includes flange base 2-1, movable V-shaped bracket 2-3, Z-shaped clamping block 2-4, lifting nut 2-5, two screws 2-6 and two nuts 2-2;

[0048] The flange base 2-1 has columns with grooves on both sides of its top. Each end of the movable V-shaped bracket 2-3 is slidably connected to the groove of one of the columns. A threaded column is set in the middle of the top of the flange base 2-1. The lifting nut 2-5 is threadedly connected to the threaded column and fits against the bottom of the movable V-shaped bracket 2-3 to support the movable V-shaped bracket 2-3. The screw 2-6 is fixed to the top of the column. Each end of the Z-shaped clamping block 2-4 is slidably connected to a screw 2-6. Each nut 2-2 is threadedly connected to a screw 2-6 and presses against the Z-shaped clamping block 2-4.

[0049] In this embodiment: the movable V-shaped bracket slides along the column groove of the flange base, and the height of the movable V-shaped bracket can be adjusted by adjusting the nut along the threaded column. The position of the Z-shaped clamping block is adjusted along the screw and tightened by the nut. The front / rear flange of the intermediate shaft is installed between the movable V-shaped bracket and the Z-shaped clamping block.

[0050] Other implementation methods are the same as those in Specific Implementation Method 1.

[0051] Specific implementation method 5: Auxiliary clamping and alignment device for machining intermediate shaft of nuclear power rotor on boring machine, the auxiliary alignment ring 4 includes alignment ring body 4-1 and slider 4-2;

[0052] The alignment ring 4-1 is fixed to the front of the flange support clamping seat 2 by the positioning bolt 4-3. The slider 4-2 is provided with an arc-shaped tenon groove. The arc-shaped tenon groove of the slider 4-2 is slidably connected to the alignment ring 4-1. The slider 4-2 moves in a circle along the central axis of the alignment ring 4-1. The slider 4-2 is used to connect a dial indicator to measure the levelness of the front flange front face of the intermediate shaft 1.

[0053] In this embodiment: the slider moves in a circular motion along the central axis of the alignment ring, and the slider is used to connect a dial indicator to measure the levelness of the front flange of the intermediate shaft.

[0054] Other implementation methods are the same as those in Specific Implementation Method 1.

[0055] Specific implementation method six: Auxiliary clamping and alignment device for machining the intermediate shaft of nuclear power rotor on a boring machine, the alignment ring 4-1 includes a circular ring plate 4-1-2, a raised tenon-shaped positioning ring 4-1-3 and two connecting arms 4-1-1;

[0056] Two connecting arms 4-1-1 are symmetrically arranged at the lower part of the annular plate 4-1-2. The protruding tenon-shaped positioning ring 4-1-3 is coaxially arranged with the annular plate 4-1-2 at the front part of the annular plate 4-1-2. The annular plate 4-1-2, the protruding tenon-shaped positioning ring 4-1-3 and the two connecting arms 4-1-1 are integrally formed. The slider 4-2 is slidably connected to the protruding tenon-shaped positioning ring 4-1-3.

[0057] Other implementation methods are the same as those in Specific Implementation Method 5.

[0058] Specific implementation method seven: Auxiliary clamping and alignment device for machining the intermediate shaft of nuclear power rotor on a boring machine, wherein a keyway 4-1-4 is provided on the protruding tenon-shaped positioning ring 4-1-3, and a screw hole is provided in the keyway 4-1-4, which is fixed by an open key block 4-1-6 by a locking screw 4-1-5.

[0059] In this embodiment: the slider is used to slide into the raised tenon-shaped positioning ring after being placed in the keyway, and then the open key block is installed to seal it.

[0060] Other implementation methods are the same as those in Specific Implementation Method Six.

[0061] Specific implementation method eight: Auxiliary clamping and alignment device for machining the intermediate shaft of nuclear power rotor on a boring machine. The two flange support clamping seats 2 and the rear flange tightening stop seat 3 are provided with waist-shaped holes. Bolts pass through the waist-shaped holes of the two flange support clamping seats 2 and the rear flange tightening stop seat 3 to position them on the worktable of the boring machine.

[0062] In this embodiment: the oblong holes of the two flange support clamping seats and the rear flange anti-stop seat are positioned on the worktable of the boring machine by passing through bolts.

[0063] Other implementation methods are the same as those in Specific Implementation Method 1.

[0064] Specific Implementation Method Nine: How to use the auxiliary clamping and alignment device for machining the intermediate shaft of a nuclear power plant rotor on a boring machine:

[0065] It includes the following steps:

[0066] Step 1: Place the two flange bases 2-1 on the worktable of the boring machine. Fix the auxiliary alignment ring 4 to the front flange base 2-1 with positioning bolts 4-3. Insert the slider 4-2 into the keyway 4-1-4 and mate the arc-shaped tenon groove of the slider 4-2 with the raised tenon-shaped positioning ring 4-1-3 with a zero-clearance fit. Then, place the open key block 4-1-6 into the keyway 4-1-4 machined on the raised tenon-shaped positioning ring 4-1-3, and fix the open key block 4-1-6 to the raised tenon-shaped positioning ring 4-1-3 with locking screws 4-1-5.

[0067] Step 2: Align the raised tenon-shaped positioning ring 4-1-3 with the machine tool machining plane on the front flange base 2-1; fix the front flange base 2-1 on the worktable of the boring machine;

[0068] Step 3: Measure the distance between the front flange of intermediate shaft 1 and the rear flange of intermediate shaft 1, and place the rear flange base 2-1 on the worktable of the boring machine according to this distance and fix it to the worktable of the boring machine;

[0069] Step 4: Screw the lifting nut 2-5 onto the threaded post of each flange base 2-1, insert both ends of the movable V-bracket 2-3 into the sliding grooves of the columns at both ends of the flange base 2-1, and adjust the height of the two V-brackets 2-3 according to the theoretical dimensions of the front and rear flanges of the intermediate shaft 1 to ensure that the axis is horizontal when the intermediate shaft 1 is placed.

[0070] Step 5: Lift the intermediate shaft 1 horizontally, so that the outer circles of the front flange and the rear flange of the intermediate shaft 1 fall on the corresponding movable V-shaped brackets 2-3. Add copper gaskets between the outer circles of the front flange and the rear flange of the intermediate shaft 1 and the corresponding movable V-shaped brackets 2-3.

[0071] Step 6: Place the rear flange tightening stop 3 on the rear flange side of the intermediate shaft 1, fix the rear flange tightening stop 3 on the worktable of the boring machine, screw the four tightening nuts 3-3 into the four square head screws 3-2, and then install the four square head screws 3-2 into the cross-shaped inverted T-shaped grooves of the rear flange tightening stop 3 respectively. Select four symmetrical points and rotate the tightening nuts 3-3 to tighten the rear flange of the intermediate shaft 1.

[0072] Step 7: Attach the dial indicator base to the slider 4-2, adjust the dial indicator rod and dial indicator head, and place the dial indicator head on the front flange of the intermediate shaft 1. Slide the slider 4-2 in a circular motion and measure the flatness of the front flange of the intermediate shaft 1 with the dial indicator. Adjust the height of the two movable V-shaped brackets 2-3 and the elongation of the tightening nuts 3-3 on the four square head screws 3-2, and adjust the thickness of the copper gaskets between the intermediate shaft 1 and the two movable V-shaped brackets 2-3 to ensure that the front flange of the intermediate shaft 1 meets the flatness requirements of the machining.

[0073] Step 8: Finally, place the two Z-shaped clamping blocks 2-4 on the outer circle of the front flange and the upper part of the outer circle of the rear flange of the intermediate shaft 1. Tighten the Z-shaped clamping blocks 2-4 with four nuts 2-2 to press the front flange and rear flange of the intermediate shaft 1. Tighten the top nuts 3-3 on the four square head screws 3-2 to press the rear flange of the intermediate shaft 1, thus completing the clamping and alignment of the intermediate shaft 1.

[0074] Specific Implementation Method 10: Method of using the auxiliary clamping and alignment device for machining the intermediate shaft of a nuclear power rotor on a boring machine: In step two, the raised tenon-shaped positioning ring 4-1-3 is leveled on the front flange base 2-1 with a tolerance of ≤ ±0.005mm.

[0075] Other implementation methods are the same as those in specific implementation method nine.

Claims

1. An auxiliary clamping and alignment device for machining the intermediate shaft of a nuclear power plant rotor on a boring machine, characterized in that: It includes a rear flange tightening stop seat (3), an auxiliary alignment ring (4), and two flange support clamping seats (2); The auxiliary alignment ring (4), flange support clamping seat (2) and rear flange tightening stop seat (3) are arranged sequentially from front to back. The auxiliary alignment ring (4) is detachably fixed on the front flange support clamping seat (2). Both flange support clamping seats (2) and the rear flange tightening stop seat (3) are fixed on the worktable of the boring machine. The rear flange tightening stop seat (3) is used to hold the rear flange of the intermediate shaft (1). The rear flange support clamping seat (2) is used to clamp the rear flange of the intermediate shaft (1). The front flange support clamping seat (2) is used to clamp the front flange of the intermediate shaft (1). The auxiliary alignment ring (4) is used to connect a dial indicator to measure the levelness of multiple positions on the front end face of the front flange of the intermediate shaft (1).

2. The auxiliary clamping and alignment device for machining the intermediate shaft of a nuclear power rotor on a boring machine according to claim 1, characterized in that: The rear flange tightening stop seat (3) includes a tightening bracket (3-1), four square head screws (3-2), and four tightening nuts (3-3). The front end face of the clamping bracket (3-1) has an inverted T-shaped groove arranged in a cross shape. The heads of the four square-head screws (3-2) are all set in the inverted T-shaped groove and slidably connected to it. The four square-head screws (3-2) are arranged in a cross shape. The end of the threaded section of each square-head screw (3-2) is threadedly connected to a clamping nut (3-3).

3. The auxiliary clamping and alignment device for machining the intermediate shaft of a nuclear power rotor on a boring machine according to claim 2, characterized in that: The top support (3-1) is made of a right-angled bent plate with two triangular reinforcing ribs welded on.

4. The auxiliary clamping and alignment device for machining the intermediate shaft of a nuclear power rotor on a boring machine according to claim 1, characterized in that: The flange support clamping seat (2) includes a flange base (2-1), a movable V-shaped bracket (2-3), a Z-shaped clamping block (2-4), a lifting nut (2-5), two screws (2-6) and two nuts (2-2); The flange base (2-1) has columns with grooves on both sides of the top. Each end of the movable V-shaped bracket (2-3) is slidably connected to the groove of a column. A threaded column is set in the middle of the top of the flange base (2-1). The lifting nut (2-5) is threadedly connected to the threaded column, and the lifting nut (2-5) fits against the bottom of the movable V-shaped bracket (2-3) to support the movable V-shaped bracket (2-3). The screw (2-6) is fixed to the top of the column. Each end of the Z-shaped clamping block (2-4) is slidably connected to a screw (2-6). Each nut (2-2) is threadedly connected to a screw (2-6), and the nut (2-2) presses on the Z-shaped clamping block (2-4).

5. The auxiliary clamping and alignment device for machining the intermediate shaft of a nuclear power rotor on a boring machine according to claim 1, characterized in that: The auxiliary alignment ring (4) includes the alignment ring body (4-1) and the slider (4-2); The alignment ring (4-1) is fixed to the front of the flange support clamping seat (2) by positioning bolts (4-3). The slider (4-2) is provided with an arc-shaped tenon groove. The arc-shaped tenon groove of the slider (4-2) is slidably connected to the alignment ring (4-1). The slider (4-2) moves in a circle along the central axis of the alignment ring (4-1). The slider (4-2) is used to connect a dial indicator to measure the levelness of the front flange front face of the intermediate shaft (1).

6. The auxiliary clamping and alignment device for machining the intermediate shaft of a nuclear power rotor on a boring machine according to claim 5, characterized in that: The alignment ring (4-1) includes a circular ring plate (4-1-2), a raised tenon-shaped positioning ring (4-1-3), and two connecting arms (4-1-1). Two connecting arms (4-1-1) are symmetrically arranged at the lower part of the ring plate (4-1-2). The protruding tenon-shaped positioning ring (4-1-3) is coaxially arranged with the ring plate (4-1-2) at the front part of the ring plate (4-1-2). The ring plate (4-1-2), the protruding tenon-shaped positioning ring (4-1-3) and the two connecting arms (4-1-1) are integrally formed. The slider (4-2) is slidably connected to the protruding tenon-shaped positioning ring (4-1-3).

7. The auxiliary clamping and alignment device for machining the intermediate shaft of a nuclear power rotor on a boring machine according to claim 6, characterized in that: The protruding tenon-shaped positioning ring (4-1-3) is provided with a keyway (4-1-4), and the keyway (4-1-4) is provided with a screw hole, which is fixed by a locking screw (4-1-5) to an open key block (4-1-6).

8. The auxiliary clamping and alignment device for machining the intermediate shaft of a nuclear power rotor on a boring machine according to claim 1, characterized in that: The two flange support clamping seats (2) and the rear flange tightening stop seat (3) are provided with waist-shaped holes. The waist-shaped holes of the two flange support clamping seats (2) and the rear flange tightening stop seat (3) are bolted to position them on the worktable of the boring machine.

9. A method of using the auxiliary clamping and alignment device for machining the intermediate shaft of a nuclear power plant rotor on a boring machine according to any one of claims 1-8, characterized in that: It includes the following steps: Step 1: Place the two flange bases (2-1) on the worktable of the boring machine. Fix the auxiliary alignment ring (4) to the front flange base (2-1) with the positioning bolts (4-3). Insert the slider (4-2) from the keyway (4-1-4) and make the arc-shaped tenon groove of the slider (4-2) match the raised tenon-shaped positioning ring (4-1-3) with zero clearance. Then, put the open key block (4-1-6) into the keyway (4-1-4) machined on the raised tenon-shaped positioning ring (4-1-3) and fix the open key block (4-1-6) to the raised tenon-shaped positioning ring (4-1-3) with the locking screws (4-1-5). Step 2: Align the raised tenon-shaped positioning ring (4-1-3) with the machine tool machining plane on the front flange base (2-1); fix the front flange base (2-1) on the worktable of the boring machine; Step 3: Measure the distance between the front flange of the intermediate shaft (1) and the rear flange of the intermediate shaft (1), and place the rear flange base (2-1) on the worktable of the boring machine according to this distance and fix it to the worktable of the boring machine; Step 4: Screw the lifting nut (2-5) onto the threaded post of each flange base (2-1), and insert both ends of the movable V-bracket (2-3) into the grooves of the columns at both ends of the flange base (2-1); adjust the height of the two V-brackets (2-3) according to the theoretical dimensions of the front flange and the rear flange of the intermediate shaft (1) to ensure that the axis is horizontal when the intermediate shaft (1) is placed. Step 5: Lift the intermediate shaft (1) horizontally, and place the outer circle of the front flange of the intermediate shaft (1) and the outer circle of the rear flange of the intermediate shaft (1) on the corresponding movable V-shaped bracket (2-3). Add copper gaskets between the outer circle of the front flange of the intermediate shaft (1) and the outer circle of the rear flange of the intermediate shaft (1) and the corresponding movable V-shaped bracket (2-3). Step 6: Place the rear flange tightening stop (3) on the rear flange side of the intermediate shaft (1), fix the rear flange tightening stop (3) on the worktable of the boring machine, screw the four tightening nuts (3-3) into the four square head screws (3-2), and then install the four square head screws (3-2) into the cross-shaped inverted T-shaped grooves of the rear flange tightening stop (3) respectively. Select four symmetrical points and rotate the tightening nuts (3-3) to tighten the rear flange of the intermediate shaft (1). Step 7: Attach the dial indicator base to the slider (4-2), adjust the dial indicator rod and dial indicator head, and place the dial indicator head on the front flange of the intermediate shaft (1). Slide the slider (4-2) in a circular motion and measure the flatness of the front flange of the intermediate shaft (1) with the dial indicator. Adjust the height of the two movable V-shaped brackets (2-3) and the elongation of the tightening nuts (3-3) on the four square head screws (3-2). Adjust the thickness of the copper gasket between the intermediate shaft (1) and the two movable V-shaped brackets (2-3) to make the front flange of the intermediate shaft (1) meet the flatness requirements of the machining. Step 8: Finally, place the two Z-shaped clamping blocks (2-4) on the outer circle of the front flange and the upper part of the outer circle of the rear flange of the intermediate shaft (1). Tighten the Z-shaped clamping blocks (2-4) with four nuts (2-2) to press the front flange and rear flange of the intermediate shaft (1). Tighten the top nuts (3-3) on the four square head screws (3-2) to press the rear flange of the intermediate shaft (1) to complete the clamping and alignment of the intermediate shaft (1).

10. The method of use according to claim 9, characterized in that: In step two, the raised tenon-shaped positioning ring (4-1-3) is leveled on the front flange base (2-1) with a tolerance of ≤ ±0.005mm.

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